Methods for storing holographic data and articles having enhanced data storage lifetime derived therefrom
US7524590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Mar 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/24612
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method for storing holographic data comprising providing an optically transparent substrate comprising a photochemically active dye and a photo-acid generator; irradiating the optically transparent substrate with a holographic interference pattern, wherein the pattern has a first wavelength and an intensity both sufficient to convert, within a volume element of the substrate, at least some of the photochemically active dye into a photo-product, producing within the irradiated volume element concentration variations of the photo-product corresponding to the holographic interference pattern, thereby producing a first optically readable datum corresponding to the volume element; and irradiating the optically transparent substrate at a second wavelength and intensity sufficient to activate the photo-acid generator to stabilize the optically readable datum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.